Obad-Hai
Old Obad-Hai is the true Neutral God of nature in the Greyhawk campaign setting for Dungeons and Dragons ( not the pussy nature of elves, like trees and flowers and shit). His Domains are; Air, Animal, Earth, Fire, Plant, Water and Weather, meaning that pretty much any class or race beside the obvious can worship him.
Not much can beat the sight of a DM's face when you tell him that you're going to make a Druid, then proceed to follow the teachings of Obad-Hai and use fire spells to cleanse the world of extreme alignments.
He commands loads of awesome beasts, like the owlbear and the awesome-as-shit Gray Render, which makes him a kind of rival to Ehlonna (who hates Obi's hardcore pets omnomnomming on her fluffy cute baby animals), but, being a true neutral deity, Obad-Hai doesn't give two shits. Obad-Hai believes that those who mess with nature and are foolish deserve swift retribution, making him a Druid's equivalent of Saint Cuthbert.
His staff Shalmstaff that helps him travel through nature, though the meaning of this is ambiguous at best. Because of his wild nature and love of beasts, you'd expect him to live in the Beastlands, but no, he's so down to earth (geddit?) that he resides in the material plane, wandering around like Fharlaghn.